Representing key phytoplankton functional groups in ocean carbon cycle models:: Coccolithophorids -: art. no. 1100

被引:231
作者
Iglesias-Rodríguez, MD
Brown, CW
Doney, SC
Kleypas, J
Kolber, D
Kolber, Z
Hayes, PK
Falkowski, PG
机构
[1] Rutgers State Univ, Environm Biophys & Mol Ecol Program, Inst Marine & Coastal Sci, New Brunswick, NJ 08901 USA
[2] Univ Bristol, Sch Biol Sci, Bristol BS8 1UG, Avon, England
[3] NOAA, Off Res & Applicat, Camp Springs, MD 20746 USA
[4] Natl Ctr Atmospher Res, Boulder, CO 80307 USA
[5] Rutgers State Univ, Dept Geol, New Brunswick, NJ 08901 USA
关键词
D O I
10.1029/2001GB001454
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
[1] Carbonates are the largest reservoirs of carbon on Earth. From mid-Mesozoic time, the biologically catalyzed precipitation of calcium carbonates by pelagic phytoplankton has been primarily due to the production of calcite by coccolithophorids. In this paper we address the physical and chemical processes that select for coccolithophorid blooms detected in Sea-viewing Wide Field-of-view Sensor (SeaWiFS) ocean color imagery. Our primary goal is to develop both diagnostic and prognostic models that represent the spatial and temporal dynamics of coccolithophorid blooms in order to improve our knowledge of the role of these organisms in mediating fluxes of carbon between the ocean, the atmosphere, and the lithosphere. On the basis of monthly composite images of classified coccolithophorid blooms and global climatological maps of physical variables and nutrient fields, we developed a probability density function that accounts for the physical chemical variables that predict the spatiotemporal distribution of coccolithophorids in the world oceans. Our analysis revealed that areas with sea surface temperatures (SST) between 3degrees and 15degreesC, a critical irradiance between 25 and 150 m mol quanta m(-2) s(-1), and decreasing nitrate concentrations (DeltaN/Deltat < 0) are selective for upper ocean large-scale coccolithophorid blooms. While these conditions favor both Northern and Southern Hemisphere blooms of the most abundant coccolithophorid in the modern oceans, Emiliania huxleyi, the Northern and Southern Hemisphere populations of this organism are genetically distinct. Applying amplified fragment length polymorphism as a marker of genetic diversity, we identified two major taxonomic clades of E. huxleyi; one is associated with the Northern Hemisphere blooms, while the other is found in the Southern Hemisphere. We suggest a rule of "universal distribution and local selection'': that is, coccolithophorids can be considered cosmopolitan taxa, but their genetic plasticity provides physiological accommodation to local environmental selection pressure. Sea surface temperature, critical irradiance, and DN/Dt were predicted for the years 2060-2070 using the NCAR Community Climate System Model to generate future monthly probability distributions of coccolithophorids based upon the relationships observed between the environmental variables and coccolithophorid blooms in modern oceans. Our projected probability distribution analysis suggests that in the North Atlantic, the largest habitat for coccolithophorids on Earth, the areal extent of blooms will decrease by up to 50% by the middle of this century. We discuss how the magnitude of carbon fluxes may be affected by the evolutionary success of coccolithophorids in future climate scenarios.
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页数:20
相关论文
共 89 条
[1]   COCCOLITH PRODUCTION AND DETACHMENT BY EMILIANIA-HUXLEYI (PRYMNESIOPHYCEAE) [J].
BALCH, WM ;
KILPATRICK, K ;
HOLLIGAN, PM ;
CUCCI, T .
JOURNAL OF PHYCOLOGY, 1993, 29 (05) :566-575
[2]   BIOLOGICAL AND OPTICAL-PROPERTIES OF MESOSCALE COCCOLITHOPHORE BLOOMS IN THE GULF OF MAINE [J].
BALCH, WM ;
HOLLIGAN, PM ;
ACKLESON, SG ;
VOSS, KJ .
LIMNOLOGY AND OCEANOGRAPHY, 1991, 36 (04) :629-643
[3]   CALCIFICATION, PHOTOSYNTHESIS AND GROWTH OF THE BLOOM-FORMING COCCOLITHOPHORE, EMILIANIA-HUXLEYI [J].
BALCH, WM ;
HOLLIGAN, PM ;
KILPATRICK, KA .
CONTINENTAL SHELF RESEARCH, 1992, 12 (12) :1353-1374
[4]   PRELIMINARY-RESULTS USING THE RAPD ANALYSIS TO SCREEN BLOOM POPULATIONS OF EMILIANIA-HUXLEYI (HAPTOPHYTA) [J].
BARKER, GLA ;
GREEN, JC ;
HAYES, PK ;
MEDLIN, LK .
SARSIA, 1994, 79 (04) :301-306
[5]  
Berger WH, 1976, CHEM OCEANOGR, P265
[6]   VALIDATION OF A SPECTRAL LIGHT-PHOTOSYNTHESIS MODEL AND USE OF THE MODEL IN CONJUNCTION WITH REMOTELY SENSED PIGMENT OBSERVATIONS [J].
BERTHON, JF ;
MOREL, A .
LIMNOLOGY AND OCEANOGRAPHY, 1992, 37 (04) :781-796
[7]  
BLACKBURN SI, 1993, AUST J MAR FRESH RES, V44, P785
[8]  
Blackmon M, 2001, B AM METEOROL SOC, V82, P2357, DOI 10.1175/1520-0477(2001)082<2357:TCCSM>2.3.CO
[9]  
2
[10]  
Boville BA, 1998, J CLIMATE, V11, P1115, DOI 10.1175/1520-0442(1998)011<1115:TNCSMV>2.0.CO